Remove the old knob by unscreening the interior side

The interior knob (the side you face when standing inside the room) holds the whole assembly together. Look for a small slot or hole on the knob's face or shank—this is the release button. Insert a flathead screwdriver or a small hex key into that slot and push or turn it, depending on your model. The knob will slide off the spindle.

Once the knob is loose, you'll see the rose (the circular trim ring behind it) and the spindle running through the door. The rose is usually held by one or two screws. Remove those screws and pull the rose away from the door. Set both the old knob and rose aside.

Key Takeaways

  • The interior knob releases by pressing or turning a small slot on its face, then slides off the spindle without tools.
  • After removing the interior knob and rose, the exterior knob and latch assembly stay in place until you unscrew the latch from the door edge.
  • The spindle, latch, and strike plate are reusable if they are not damaged, so you only need to buy the new knobs and roses.
  • Schlage knobs fit standard spindles, so measure your spindle length before buying if your door is thicker than normal.
  • The whole job takes about 15 minutes and requires only a screwdriver and a hex key or Allen wrench.

Unscrew the latch from the door edge

Look at the edge of the door where the latch bolt sticks out. You'll see two screws running through the latch plate into the door frame. Remove both screws and pull the latch assembly straight out toward you. The spindle will come with it.

Inspect the latch for damage—if the bolt moves freely and the springs are intact, you can reuse it. If the bolt is bent or stuck, you'll need a replacement latch, which Schlage sells separately. Most homeowners find the existing latch works fine and only replace the knobs.

Install the new latch if needed, or reuse the old one

If you're keeping the old latch, slide it back into the hole in the door edge, line up the screw holes, and drive both screws back in firmly. The latch should sit flush with the door edge and the bolt should move smoothly when you press it.

If you're installing a new Schlage latch, make sure it matches your door thickness and backset (the distance from the door edge to the center of the knob hole—usually 2⅜ inches or 2¾ inches). Slide the new latch in, align the screw holes, and tighten both screws. Do not overtighten, or you risk cracking the latch body.

Slide the spindle through and position the exterior knob

The spindle is the metal rod that runs through the latch and connects both knobs. If you removed the old latch, the spindle came out with it. If you reused the latch, the spindle is still in place. Either way, make sure the spindle is fully seated in the latch hole.

Slide the exterior knob onto the spindle from outside the door. The knob should sit flush against the door face. If there is a gap between the knob and the door, the spindle may be too long—measure it and compare to Schlage's specifications for your door thickness. Most standard doors use a spindle between 2⅜ and 2¾ inches long.

Install the interior rose and knob

Slide the interior rose onto the spindle and push it flush against the door. Align the screw holes in the rose with the holes in the door, and drive both screws in firmly. The rose should not move or rattle.

Now slide the interior knob onto the spindle. Push it all the way in until you hear or feel a click—this means the release button has engaged and locked the knob in place. Turn the knob to make sure it spins freely and the latch bolt moves in and out smoothly. If the knob is stiff or the latch does not move, remove the knob and check that the spindle is fully seated in the latch.

Test the lock and adjust the strike plate if needed

Close the door and turn the interior knob to lock it. The bolt should slide into the latch hole smoothly. Open the door from the outside using the exterior knob—it should turn freely and the door should open without resistance.

If the door is hard to open or the bolt does not retract fully, the strike plate (the metal plate on the door frame that the bolt enters) may need adjustment. Loosen the strike plate screws and move it slightly up, down, or forward until the bolt slides in and out without binding. Tighten the screws and test again.

Frequently Asked Questions

Do I need to remove the door to replace the knob?

No. The entire job is done with the door hanging in the frame. You only need access to both sides of the door, which you have when the door is open.

What if the release button is stuck and won't turn?

Try tapping the screwdriver gently with a hammer to break corrosion loose. If that doesn't work, spray a small amount of penetrating oil (like WD-40) into the slot, wait 10 minutes, and try again. If the knob still won't release, you may need to remove the latch and tap the spindle out from the other side.

Can I replace just one knob if the other side still works?

Yes, but both knobs share the same spindle, so you'll have to remove the working knob to access it. Since you're already in there, many people replace both at once. Schlage knobs are inexpensive, so the cost difference is small.

What spindle length do I need?

Standard interior doors are 1⅜ inches thick and use a 2⅜-inch spindle. Exterior doors and some thick interior doors use 2¾ inches. Measure the thickness of your door and check the Schlage product page for your knob model—it will list the correct spindle length.

Is there a difference between a privacy lock and a passage knob?

Yes. A privacy knob (for bathrooms and bedrooms) has a lock button on the interior side and a small hole on the exterior that lets you unlock it from outside in an emergency. A passage knob has no lock. Make sure you buy the type you need for each room.